Patents Assigned to Doosan Machine Tools Co., Ltd.
  • Patent number: 10459420
    Abstract: Disclosed are a method for setting a feed rate of a rotating cutting tool in real time and a device for controlling a feed rate of a rotating cutting tool in real time. The method includes: a vibration data collecting operation (S20) of collecting vibration information from a sensor installed in a machine tool (100); a chatter vibration trend diagram deducing operation (S30) of deducing a chatter vibration trend diagram (G) by simplifying an increase and a decrease of chatter vibration based on the collected vibration data; a chatter vibration trend determining operation (S40) of determining whether an inclination of the chatter vibration trend diagram (G) is increased or decreased; and tool feed rate adjusting operations (S51 and S52) of adjusting a feed rate of the tool to be decreased when the inclination of the chatter vibration trend diagram (G) is increased.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: October 29, 2019
    Assignee: DOOSAN MACHINE TOOLS CO., LTD.
    Inventors: Kang Jae Lee, Jin Suk Song
  • Patent number: 10369637
    Abstract: The present invention relates to a five-axis machining apparatus. A five-axis machining apparatus according an embodiment of the present invention includes: a column; a slide coupled to the column so as to be slidable in a vertical direction; a main spindle drive unit supported on the back of the slide; and a tiltable spindle module detachably coupled to the front of the slide, and configured to receive rotation power from the main spindle drive unit.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: August 6, 2019
    Assignee: DOOSAN MACHINE TOOLS CO., LTD.
    Inventor: Hyo Seog Kang
  • Patent number: 10203682
    Abstract: Disclosed is a position controller for a tilting head in a machining center. The position controller includes an offset attachment having a body combined to the tilting head and a spherical contact secured to the body, an offset detector built in the machining center such that the offset detector move out into a process area of the machining center and automatically detects a tool offset from a contact point with the spherical contact, a storing unit individually storing first and second tool offsets by respective rotation positions of the tilting head, and an operator generating a transform offset of the first tool offset by a rotational transform and a center error vector from the transform offset and the second tool offset. Accordingly, the center error of the tilting head is automatically detected and corrected in the machining center.
    Type: Grant
    Filed: April 13, 2017
    Date of Patent: February 12, 2019
    Assignee: DOOSAN MACHINE TOOLS CO., LTD.
    Inventor: Hyon-Seok Kim
  • Patent number: 10197988
    Abstract: According to an embodiment of the present invention, a torque variation of a servomotor, which is measured in a numerical control apparatus of an existing numerical control machine tool, is observed, and a backlash is detected by calculating a transfer distance of an output shaft of the servomotor at a torque peak, without adding additional positioning detection equipment, thereby detecting an accurate backlash amount without adding additional equipment.
    Type: Grant
    Filed: May 9, 2012
    Date of Patent: February 5, 2019
    Assignee: Doosan Machine Tools Co., Ltd.
    Inventor: Ki Hong Kim
  • Patent number: 10189092
    Abstract: The present invention relates to a machine tool including a ram spindle and a tool holder, and provides a machine tool comprising: a tool holder including at least two inserts; and a ram spindle capable of fixing the tool holder in a clamped state or rotating the tool holder in order to change the position of the insert, such that the position of the insert can be quickly changed, thereby enabling an improvement in productivity and precision and a reduction in product costs.
    Type: Grant
    Filed: February 5, 2016
    Date of Patent: January 29, 2019
    Assignee: DOOSAN MACHINE TOOLS CO., LTD.
    Inventor: Tae Hyeong Kwon
  • Patent number: 10124456
    Abstract: A rotary table according to the exemplary embodiment of the present disclosure includes a piston 70 having a first tapered portion 72, and a clamp 80 having a second tapered portion 82. When the first tapered portion 72 comes into close contact with the second tapered portion 82 by a movement of the piston 70, a pallet base 30 is fixed to a table base 10, and thus the pallet base 30 is rotated, thereby maintaining a preset posture.
    Type: Grant
    Filed: March 28, 2017
    Date of Patent: November 13, 2018
    Assignee: DOOSAN MACHINE TOOLS CO., LTD.
    Inventor: Jong Bong Kim
  • Patent number: 10073437
    Abstract: Disclosed are a method and an apparatus for compensating thermal displacement of a machine tool, the apparatus including: a compensation quantity calculating unit configured to calculate a compensation quantity by using temperature data and a predetermined compensation parameter; a smoothing filter configured to exponentially smooth the calculated compensation quantity; a scaling unit configured to scale the exponentially smoothed compensation quantity; a time-dispersion compensating unit configured to calculate a final compensation quantity by time-dispersion compensation for the scaled compensation quantity according to a time-dispersion compensating period; and a control unit configured to compensate each axis of equipment according to the final compensation quantity, and adjusts the time-dispersion compensating period of the time-dispersion compensating unit according to an error absolute value representing a difference between an input value and an output value of the time-dispersion compensating unit.
    Type: Grant
    Filed: October 28, 2015
    Date of Patent: September 11, 2018
    Assignee: DOOSAN MACHINE TOOLS CO., LTD.
    Inventor: Ki Hong Kim
  • Patent number: 9999952
    Abstract: The present disclosure relates to a structure for reducing thermal displacement of a machine tool structure, and more particularly, to a structure for reducing thermal displacement of a machine tool structure capable of reducing thermal displacement of a structure in order to prevent processing precision from deteriorating due to deformation of a fixed structure by heat generated at a part where the fixed structure and a movable structure perform frictional motion together with each other. Accordingly, in order to resolve a technical problem, an object of the present invention is to provide a structure for reducing thermal displacement of a machine tool structure capable of preventing a structure from being deformed and distorted by reducing a temperature deviation over the entire structure by rapidly transferring heat to other parts when a temperature of a specific part of the structure is raised.
    Type: Grant
    Filed: July 16, 2012
    Date of Patent: June 19, 2018
    Assignee: Doosan Machine Tools Co., Ltd.
    Inventors: Won Nyun Kim, Tae Weon Gim, Yoon Jong Lee, Sang Kyoo Lee
  • Patent number: 9886023
    Abstract: The present disclosure relates to a method for managing turret tools for a machine tool, and more particularly, by setting tool information and changing a mounting location of the tool, which is to be mounted or has been mounted, by using visual information about a turret mounted in the machine tool and the tool mounted in the turret, a user may intuitively check information about a tool mounted on the turret and to easily set tool installation information which needs to be set when mounting and detaching the tool, changing a location of the tool, or installing the tool in a machine tool.
    Type: Grant
    Filed: October 17, 2013
    Date of Patent: February 6, 2018
    Assignee: Doosan Machine Tools Co., Ltd.
    Inventors: Ji Eun Yi, Sung Hoon Cho
  • Patent number: 9766613
    Abstract: According to an exemplary embodiment of the present disclosure, a method of setting up a work piece based on a vision is present. The method of setting up a work piece based on a vision comprises: calculating a start point of a work piece from the image of a work piece within a vision screen formed by a camera; capturing an image when a tool is captured in the vision screen; and calculating an offset value of the tool from the captured image.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: September 19, 2017
    Assignee: Doosan Machine Tools Co., Ltd.
    Inventors: Gye Bong Jang, Dong Hwan Kim
  • Patent number: 9760083
    Abstract: The apparatus for detecting damage to the tool in the machine and the method of detecting damage to the tool according to the present disclosure are applied to a machine, such as a CNC, to detect and control damage to a tool and possibility of damage in advance, thereby efficiently managing processing work by the machine while achieving safety of the machine.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: September 12, 2017
    Assignee: Doosan Machine Tools Co., Ltd.
    Inventors: Dae Hyuk Chung, Dae Jung Sung
  • Patent number: 9684299
    Abstract: The present disclosure relates to a system and a method for managing machine tool information for heterogeneous numerical control devices, and more particularly, to a system and a method for managing machine tool information for heterogeneous numerical control devices which may manage data of heterogeneous numerical control devices by a mobile device through a network, such as a wide area Internet or local WiFi, and monitor an operational state of the machine tool.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: June 20, 2017
    Assignee: Doosan Machine Tools Co., Ltd.
    Inventors: Dae Hyuk Chung, Jang Nam Han, Jong Tae Kim, Jong Myoung Park, Joo Sik Lee
  • Patent number: 9604287
    Abstract: Disclosed are a setting method and a control device of a depth of cut in an initial axial direction for a rotating cutting tool. A setting method of a depth of cut in an initial axial direction for a rotating cutting tool according to the present disclosure includes when a tool T is mounted on a spindle S, receiving an overhang length L of the tool T, the diameter D of the tool T, an overhang length ratio reference value C, and an axial depth of cut reference value E; calculating an axial depth of cut Y; and setting the axial depth of cut Y as an initial axial depth of cut of a cutting process.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: March 28, 2017
    Assignee: Doosan Machine Tools Co., Ltd.
    Inventors: Kang Jae Lee, Jin Suk Song, Han Kee Jang
  • Patent number: 9588512
    Abstract: Disclosed is a setting method of revolutions per minute on a real time of a rotating cutting tool, and a control device, and more particularly, a vibration characteristic is consistently evaluated and analyzed when a cutting process is in progress to suppress and avoid suppression.
    Type: Grant
    Filed: June 10, 2014
    Date of Patent: March 7, 2017
    Assignee: Doosan Machine Tools Co., Ltd.
    Inventors: Kang Jae Lee, Jin Suk Song
  • Patent number: 9557897
    Abstract: The present disclosure relates to an apparatus and a method for inputting a processing shape using an interactive program in a computer numerical control machine tool, including: an input unit having a key for inputting a parameter of an inputted shape; a display unit which registers a shape processed by a user as a user registration shape and provides a user interface environment capable of editing the registered user registration shape; a memory unit which stores a plurality of user registration shapes; an interactive program control unit which displays the plurality of user registration shapes stored in the memory unit through the display unit when the user requests the user registration shape, and outputs shape information after the user selects a representative shape from the plurality of user registration shapes and inputs a parameter of the representative shape; and a programmable machine controller (PMC) unit which drives the machine tool on the basis of the shape information outputted from the intera
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: January 31, 2017
    Assignee: Doosan Machine Tools Co., Ltd.
    Inventor: Dong Hwan Kim
  • Patent number: 9507340
    Abstract: A tool path part program modification system of an NC machine tool according to an aspect of the present disclosure, includes: a human-machine interface unit which receives a tool path part program having one or more processing blocks; an NC kernel unit which interprets the part program inputted to the human-machine interface unit for each processing block, and generates each processing block information; a tool path modification module unit which sequentially calls the processing block information interpreted by the NC kernel unit, and modifies a consecutive rapid transfer processing block group such that tool paths are reduced, when the consecutive rapid transfer processing block group is present in which the predetermined reference number or more of processing blocks including rapid transfer commands are consecutively included; and a simulator unit which simulates the part program for each processing block interpreted by the NC kernel unit.
    Type: Grant
    Filed: November 1, 2011
    Date of Patent: November 29, 2016
    Assignee: Doosan Machine Tools Co., Ltd.
    Inventors: Dae Hyuk Chung, Jong Myoung Park, Joo Sik Lee